Perhaps you should try some spelling variations:
communication costly » communication costs, communication costa, communications costs
trade development » software development
based inflation » cases inflation, based information, based innovation
inflation state » inflation starts, inflation rate, simulation state
4 communication » 3 communication, 5.4 communication, de communication
development li » development lid, development lie, development lin
costly trade » costs trade, country trade, costly than
li afrique » l afrique, en afrique
space 4 » space _, space a, space 1

You may be able to get more results by adjusting your search query.

• Adding a wildcard symbol may retrieve word variants: technology based inflation state space 4 communication costly trade development li afrique.*.